how to replace crank seals

[Chicago Ben]

For the record- using this exact unit:



http://www.harborfreight.com/flex-drive ... 92697.html

[Trafficjamz]

well there's most of your problem.

That huge hose adds cc's to the head and misrepresents the compression reading.

[Trafficjamz]

why do you think the compression is low? What did you tear this engine down?

was is the going over bump stall issues still?

[Chicago Ben]

I was riding it one night and everything was fine then lost power, had to limp it home

I guess I never tried a compression reading when I got it from you... You think that hose really makes a difference? Only thing I have done since was rebuild the top end. The cut out issue was taken care of when I swapped the oko carb for the Keihin carb (oko float was goofy)

[Trafficjamz]

yes the hose can affect reading by as much as 15psi


Leaking crank seals would not not be a likely reason to loose all power.

If the piston was not scratched and the rings were not stuck to it, the compression is probably fine.

[Chicago Ben]

Interesting, I'll button everything back up this weekend and see what happens. I am going to run a 60 pilot and either 135 or 140 main on that 28mm keihin. Very least I have replacement seals if I need to....

[Chicago Ben]

not sure what the * the issue was. I buttoned everything back up, running a 60 pilot, 140 main and it runs flawless now. I think the top end worked itself slightly loose when I lost power.

Either way - seems great now. My only only slight issue is that it seems like my idle is fine, but to start moving i need to bring my revs up a considerable amount - but once it gets going it gets going fast. probably does about 60-65

[Trafficjamz]

what size grab springs do you have in the clutch?

[Chicago Ben]

If I can remember correctly - I have a Keli Medium Clutch and we swapped in Polini 1000 triple springs - not sure if they were 1000's , pretty sure though. I know for a fact we swapped in polini's into that clutch. The big center spring was 1000 or 1500 yellow spring.

[Trafficjamz]

do a comp test now that it is back on the scooter.
It is eaiser to kick on the scooter.

the large grab springs are the reason it revs before it moves.

[Chicago Ben]

hmmm - are you familiar with anyone who sells smaller rated triple springs? Would this be comparable to a higher stall auto trans on a car? (would assume so)

[Trafficjamz]

hmmm - are you familiar with anyone who sells smaller rated triple springs? Would this be comparable to a higher stall auto trans on a car? (would assume so)

http://www.ebay.com/itm/KOSO-HP-perform ... 416303422c

[Chicago Ben]

hmmm - are you familiar with anyone who sells smaller rated triple springs? Would this be comparable to a higher stall auto trans on a car? (would assume so)

http://www.ebay.com/itm/KOSO-HP-perform ... 416303422c

pretty sure the polini's i have in my clutch are rated at 1000rpm as well

[dun rite]

I had the polini natural springs in mine, made it very none street friendly. Went back to stock ones.

[paulpauly7]

just put in some stock springs .Ive got 4k springs and love them i like having a bit of throttle to play with